Director Shareholding

Spirent PLC
18 January 2001


                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

    SPIRENT PLC


2)  NAME OF DIRECTOR

    ERIC GEORGE HUTCHINSON


3)  Please state whether notification indicates that it is in respect of
    holding of the shareholder named in 2 above or in respect of a
    non-beneficial interest or in the case of an individual holder
    if it is a holding of that person's spouse or children under the
    age of 18 or in respect of an non-beneficial interest

    HOLDING BY EMPLOYEE BENEFIT TRUST OF WHICH DIRECTORS (AND OTHER EMPLOYEES)
    ARE BENEFICIARIES AS A SAYE SHARE SCHEME PARTICIPANT

4)  Name of the registered holder(s) and, if more than one holder, the
    number of shares held by each of them. (If notified)

    SPIRENT QUEST LIMITED - A WHOLLY OWNED SUBSIDIARY OF SPIRENT PLC


5)  Please state whether notification relates to a person(s) connected
    with the Director named in 2 above and identify the connected person(s)

N/A

6)  Please state the nature of the transaction. For PEP transactions
    please indicate whether general/single co PEP and if discretionary/non
    discretionary

    THE DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEE OPTION HOLDERS,
    IS A POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF 
    HIS INDIVIDUAL SAYE SHARE OPTION HOLDING AND IS THEREFORE TREATED AS NO 
    LONGER INTERESTED IN THE SHARES DISPOSED OF BY SPIRENT QUEST LIMITED


7)  Number of shares/amount of
    stock acquired

 -

8)   (- %)
    of issued Class


9)  Number of shares/amount
    of stock disposed from
    QUEST by Company

    14,135


10)  (0.00153%)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

    1,137 @  83.21P
    1,057 @ 103.57P
    6,797 @ 106.47P
    1,144 @ 108.56P
    4,000 @ 116.68P
   14,135


13) Date of transaction

    17 JANUARY 2001


14) Date company informed

    17 JANUARY 2001


15) Total holding following this notification

    DIRECTOR  -     QUEST   -     4,820,409
    NO CHANGE                       (14,135)
                                  4,806,274


16) Total percentage holding of issued class following this notification

    1.497%


     IF A DIRECTOR HAS BEEN GRANTED OPTIONS BY THE COMPANY PLEASE
                    COMPLETE THE FOLLOWING BOXES

17) Date of grant



18) Period during which or date on which exercisable



19) Total amount paid (if any) for grant of the option



20) Description of shares or debentures involved: class, number.



21) Exercise price (if fixed at time of grant) or indication that price
    is to be fixed at time of exercise



22) Total number of shares or debentures over which options held
    following this notification



23) Any additional information

    THE DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEES, IS A POTENTIAL
    BENEFICIARY OF THE EMPLOYEE BENEFIT TRUSTS ESTABLISHED IN RESPECT OF THE
    LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE   
    PLAN.  THIS IS THEREFORE ONLY A TECHNICAL NOTIFICATION REQUIRED BY THE CA
    1985 AND IS NOT AN ACTUAL DEALING BY THE DIRECTOR.


24) Name of contact and telephone number for queries

    REBECCA LLOYD
    01293 767676


25) Name and signature of authorised company official responsible for
    making this notification


   Date of Notification   18 JANUARY 2001
                              



                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

    SPIRENT PLC


2)  NAME OF DIRECTOR

    NICHOLAS KELVIN BROOKES


3)  Please state whether notification indicates that it is in respect of
    holding of the shareholder named in 2 above or in respect of a
    non-beneficial interest or in the case of an individual holder
    if it is a holding of that person's spouse or children under the
    age of 18 or in respect of an non-beneficial interest

    HOLDING BY EMPLOYEE BENEFIT TRUST OF WHICH DIRECTORS (AND OTHER EMPLOYEES)
    ARE BENEFICIARIES AS A SAYE SHARE SCHEME PARTICIPANT

4)  Name of the registered holder(s) and, if more than one holder, the
    number of shares held by each of them. (If notified)

    SPIRENT QUEST LIMITED - A WHOLLY OWNED SUBSIDIARY OF SPIRENT PLC


5)  Please state whether notification relates to a person(s) connected
    with the Director named in 2 above and identify the connected person(s)

N/A


6)  Please state the nature of the transaction. For PEP transactions
    please indicate whether general/single co PEP and if discretionary/non
    discretionary

    THE DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEE OPTION HOLDERS,
    IS A POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF 
    HIS INDIVIDUAL SAYE SHARE OPTION HOLDING AND IS THEREFORE TREATED AS NO 
    LONGER INTERESTED IN THE SHARES DISPOSED OF BY SPIRENT QUEST LIMITED


7)  Number of shares/amount of
    stock acquired

 -

8)   (-  %)
    of issued Class


9)  Number of shares/amount
    of stock disposed from
    QUEST by Company

    14,135


10)  (0.00153%)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

    1,137 @  83.21P
    1,057 @ 103.57P
    6,797 @ 106.47P
    1,144 @ 108.56P
    4,000 @ 116.68P
   14,135


13) Date of transaction

    17 JANUARY 2001


14) Date company informed

    17 JANUARY 2001


15) Total holding following this notification

    DIRECTOR  -     QUEST   -     4,820,409
    NO CHANGE                       (14,135)
                                  4,806,274


16) Total percentage holding of issued class following this notification

    1.504%


     IF A DIRECTOR HAS BEEN GRANTED OPTIONS BY THE COMPANY PLEASE
                    COMPLETE THE FOLLOWING BOXES

17) Date of grant



18) Period during which or date on which exercisable



19) Total amount paid (if any) for grant of the option



20) Description of shares or debentures involved: class, number.



21) Exercise price (if fixed at time of grant) or indication that price
    is to be fixed at time of exercise



22) Total number of shares or debentures over which options held
    following this notification



23) Any additional information

    THE DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEES, IS A POTENTIAL
    BENEFICIARY OF THE EMPLOYEE BENEFIT TRUSTS ESTABLISHED IN RESPECT OF THE
    LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE   
    PLAN.  THIS IS THEREFORE ONLY A TECHNICAL NOTIFICATION REQUIRED BY THE CA
    1985 AND IS NOT AN ACTUAL DEALING BY THE DIRECTOR.


24) Name of contact and telephone number for queries

    REBECCA LLOYD
    01293 767676


25) Name and signature of authorised company official responsible for
    making this notification


   Date of Notification   18 JANUARY 2001